You may wish to consider disabling your profile rather than deleting it. Disabling will hide your profile from all members, but you'll still be able to log in and re-enable it at any time, (for up to a year). You will not risk the loss of your old messages, settings, saved profiles etc. Log in and go to this page account settings. The enable/disable option is at the top of the middle column on a desktop or laptop, or you will need to scroll down on a mobile device.
If you definitely want to delete now, then the delete link is on the same page, in the bottom right hand corner on a desktop or laptop, or you will need to scroll to the very bottom of the page on a mobile device.